Heat wok and add oil. When oil is ready, add the marinated pork. Stir-fry pork until the color darkens. Add salt and stir. Add the salted black beans. Mash the beans with a cooking ladle until they blend in well with the meat.

Add the chili paste, then the stock, bean curd, and leek or green onions.
Turn down the heat. Cook for 3 - 4 minutes.